4X Motor Racerstar 8520 8.5x20mm 53500RPM sem Núcleo para Eachine QX80 DIY Quadcopter FPV
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These Racerstar 8520 motors consume a maximum of 4.1 amps each according to my tests done before putting them on the frame of the EX100 in replacement to Chaoli which consumes up to 2 amperes. So, since I was getting 125 grams of thrust with the Chaoli motors. I felt that these Racerstar motors could potentially produce 250 grams of thrust using double the current. However, I got a total of 165 grams of thrust with 4 Racerstar motors, 97 grams with 2 motors and 50 grams using a single motor. Since we should get a total thrust of 200 grams (or up to the estimated 250 grams), the total thrust is definitely limit by some factor (24awg wire on the flight controller, micro losi connector, the flight controller that support max 5A per motor, etc.). In fact the current consumption seems to limit to about 10A. So, I recommend using these motors with a flight controller supporting 10A per motor and with an XT30 connector to be able to use these motors to their full potential. Despite everything I am very satisfied with these motors so far.
motors 8520 placed on parrot frame for replace old original motors, same size. soldered on F3_evo brush flight controller, they are loudly and original parrot propellers (blue prop) fit well on it, but i have put on it walkera props. they are shortest than parrot props, but less noisy with same responsive and flight time duration. motors are little hot after flight but maybe need to set speed rpm on cleanflight for use them efficiency. (set in CLI to set_motor_pwm=32000 motors doesn't heat than on first try without settings) 6 min flight time with 200mw video tx integrated - 380mah 3.7v battery. excellent efficiency. great motors.